@misc{indiciae2361e6833000,
  title = {Automated ion-selective electrode method for determining fluoride in natural waters},
  author = {D. E. Erdmann},
  year = {2002},
  doi = {10.1021/es60101a008},
  url = {https://pubs.usgs.gov/publication/70010162},
  note = {Source identifier: 70010162}
}